If we do end up getting that figure, the show would probably have to focus a little the serpentine again in order to warrant the flute being reintroduced since they have said all the flutes have been destroyed. However they never actually showed the flute being destroyed and Pythor was the last one with it and he is still running around.

Lego has been using that scared version of Kai's face since the beginning of the theme, but when they started making the tv show they left the scars off of his character model (probably to make him look more likable). You probably are more familiar with the tv show version and that is why you thought it has been changed.
Awesome review

I would say a good bit of the fanbase are fans just because of the cartoon and mainly hangs around cartoon fan sites. For instance, while the subreddit doesn't seem to have that large of a following, I have seen a lot of followers on places like twitter and tumbler talking about parts of the show and making fanart. These places also seem like the places a 12 year old would be more likely to hang out as opposed to here.

I know a few people have already answered this question to specific degrees, but I just wanted to let you know I made a sort visual guide to the differences between all of the ghost from this wave: http://imgur.com/a/lcub3 . This might be easier to see the differences with.
Edit: It now includes the skreemers

If you look at Morro's minifigure his hairpiece with the addition of the scarf almost covers his head to the same extent as a hood and the head still looks fine even though there isn't much light getting through.

The riddle for that part of the test read "to move forward don't look ahead", so the reason for the ice reflecting their future selves was part the test and they needed to not get distracted by their reflections in order to move on since they were in a maze. However why that ice specifically shows their reflection I think the only answer to that is: "Tomb of Spinjitzu Master magic"
Well the reason would be for them to match...

There was also the unaccounted for pirate hat in the recent Destiny's Bounty set. I'd love to see them having a ship to ship battle between the bounty and whatever the pirates have.
Also I thought this would be funny so I'll just leave it here: http://imgur.com/1HrhAbJ